If main concern was economy, there were no reason for us to go from VW Golf 2.0tdi DSG.
The CT is not cheaper in fuel as the old 2005 diesel was. Comfort, more comfort is something else. Not that the VW was not OK, but seats with electric adjustment and memory for 3 drivers (we only are 2), fantastic audio (ML) built-in navigation (found out later it sucks) sun-roof, folding mirrors, rear-camera, cruise-control, automatic control of vehicle in front with brake assists when needed plus something I probably forget to mention is more than reason enough to justify going from VW Golf to Lexus CT. For us at least. We are all different.
The CT has had nothing failing on us and only need visit Lexus to get service to keep hybrid warranty.